元组对象

type PyTupleObject

此子类型的 PyObject represents a Python tuple object.

PyTypeObject PyTuple_Type
属于 稳定 ABI (应用程序二进制接口) .

此实例的 PyTypeObject represents the Python tuple type; it is the same object as tuple 在 Python 层。

int PyTuple_Check ( PyObject * p )

返回 True 若 p is a tuple object or an instance of a subtype of the tuple type. This function always succeeds.

int PyTuple_CheckExact ( PyObject * p )

返回 True 若 p is a tuple object, but not an instance of a subtype of the tuple type. This function always succeeds.

PyObject * PyTuple_New ( Py_ssize_t len )
返回值：新引用。 属于 稳定 ABI (应用程序二进制接口) .

Return a new tuple object of size len ，或 NULL with an exception set on failure.

PyObject * PyTuple_Pack ( Py_ssize_t n , ... )
返回值：新引用。 属于 稳定 ABI (应用程序二进制接口) .

Return a new tuple object of size n ，或 NULL with an exception set on failure. The tuple values are initialized to the subsequent n C arguments pointing to Python objects. PyTuple_Pack(2, a, b) 相当于 Py_BuildValue("(OO)", a, b) .

Py_ssize_t PyTuple_Size ( PyObject * p )
属于 稳定 ABI (应用程序二进制接口) .

Take a pointer to a tuple object, and return the size of that tuple. On error, return -1 and with an exception set.

Py_ssize_t PyTuple_GET_SIZE ( PyObject * p )

像 PyTuple_Size() , but without error checking.

PyObject * PyTuple_GetItem ( PyObject * p , Py_ssize_t pos )
返回值：借位引用。 属于 稳定 ABI (应用程序二进制接口) .

Return the object at position pos in the tuple pointed to by p 。若 pos is negative or out of bounds, return NULL and set an IndexError 异常。

The returned reference is borrowed from the tuple p (that is: it is only valid as long as you hold a reference to p ). To get a 强引用 ，使用 Py_NewRef(PyTuple_GetItem(...)) or PySequence_GetItem() .

PyObject * PyTuple_GET_ITEM ( PyObject * p , Py_ssize_t pos )
返回值：借位引用。

像 PyTuple_GetItem() , but does no checking of its arguments.

PyObject * PyTuple_GetSlice ( PyObject * p , Py_ssize_t low , Py_ssize_t high )
返回值：新引用。 属于 稳定 ABI (应用程序二进制接口) .

Return the slice of the tuple pointed to by p between low and high ，或 NULL with an exception set on failure.

This is the equivalent of the Python expression p[low:high] . Indexing from the end of the tuple is not supported.

int PyTuple_SetItem ( PyObject * p , Py_ssize_t pos , PyObject * o )
属于 稳定 ABI (应用程序二进制接口) .

Insert a reference to object o 在位置 pos of the tuple pointed to by p 。返回 0 on success. If pos is out of bounds, return -1 and set an IndexError 异常。

注意

This function “steals” a reference to o and discards a reference to an item already in the tuple at the affected position.

void PyTuple_SET_ITEM ( PyObject * p , Py_ssize_t pos , PyObject * o )

像 PyTuple_SetItem() , but does no error checking, and should only be used to fill in brand new tuples.

Bounds checking is performed as an assertion if Python is built in 调试模式 or with assertions .

注意

This function “steals” a reference to o , and, unlike PyTuple_SetItem() , does not discard a reference to any item that is being replaced; any reference in the tuple at position pos will be leaked.

int _PyTuple_Resize ( PyObject * * p , Py_ssize_t newsize )

Can be used to resize a tuple. newsize will be the new length of the tuple. Because tuples are supposed to be immutable, this should only be used if there is only one reference to the object. Do not use this if the tuple may already be known to some other part of the code. The tuple will always grow or shrink at the end. Think of this as destroying the old tuple and creating a new one, only more efficiently. Returns 0 on success. Client code should never assume that the resulting value of *p will be the same as before calling this function. If the object referenced by *p is replaced, the original *p is destroyed. On failure, returns -1 并设置 *p to NULL , and raises MemoryError or SystemError .

结构序列对象

Struct sequence objects are the C equivalent of namedtuple() objects, i.e. a sequence whose items can also be accessed through attributes. To create a struct sequence, you first have to create a specific struct sequence type.

PyTypeObject * PyStructSequence_NewType ( PyStructSequence_Desc * desc )
返回值：新引用。 属于 稳定 ABI (应用程序二进制接口) .

Create a new struct sequence type from the data in desc , described below. Instances of the resulting type can be created with PyStructSequence_New() .

返回 NULL with an exception set on failure.

void PyStructSequence_InitType ( PyTypeObject * type , PyStructSequence_Desc * desc )

Initializes a struct sequence type type from desc 原位。

int PyStructSequence_InitType2 ( PyTypeObject * type , PyStructSequence_Desc * desc )

像 PyStructSequence_InitType() ，但返回 0 on success and -1 with an exception set on failure.

Added in version 3.4.